Mix half and half with low-fat houmous (you will have to syn this) for a lovely dip to have with slices of pepper, cucumber, carrot, etc.
Add a syns's worth of jam or lemon curd and stir in well - have with fruit or on its own.
Make up a sugar-free jelly with half a pint of water and let it cool. Whisk in the yogurt until smooth - add a little water if it doesn't quite reach the pint mark in the jug.
Mix with chopped cucumber, seasoning and garlic if you like it - another dip.